How do you plan on "Boycotting" their products/services/banking/etc.?
YOU ONLY SEE WHAT THEY WANT YOU TO SEE, AND YOU ONLY CAN BUY WHAT THEY ALONE SELL.
This includes ownership, via "Donations" through front organizations, to control the Government Branches, judges, DA's, Congress people, and Government "Employees", via their Union Control.
If you don't believe it, you need help.
As for debunking, there are, at least in Texas, numerous community banks and credit unions that are not publicly traded. If Chase or Bank of America cuts you off, just go to your locally owned bank or credit union and do business there.